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Fuel tank

A fuel tank and half-body technology, which is applied in the field of fuel tank improvement, can solve the problems of fuel tank weight increase, etc., and achieve the effects of strengthening the fuel tank, improving light weight and durability, and improving aesthetics

Inactive Publication Date: 2011-07-20
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the general-purpose engine is sometimes in a state of rollover due to its severe operating environment. At this time, the fuel tank also has to resist a large impact force, and it is especially required that the flange joints of the upper and lower tank halves have no High intensity where a fuel leak occurs
In addition, conventionally, this requirement has been met by increasing the thickness of the steel plate used as the raw material of the tank body. However, the increase in the thickness of the steel plate leads to an increase in the weight of the fuel tank.

Method used

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Embodiment 1

[0054] First of all, in figure 1 Here, the symbol E denotes a general-purpose four-stroke engine as a power source for various working machines. The engine E has a crankcase 2 supporting a crankshaft 1 arranged in the horizontal direction and a cylinder portion 3 protruding diagonally upward from the crankcase 2. A fuel tank T supported by the crankcase 2 is arranged directly above the crankcase 2, and A vaporizer 4 is installed on one side of the cylinder portion 3, and an air cleaner 6 is connected to the vaporizer 4 via an intake passage 5. The air cleaner 6 is arranged in the cylinder so as to be arranged on the side of the fuel tank T Directly above section 3.

[0055] Such as figure 2 , image 3 and Image 6 As shown, the above-mentioned fuel tank T is composed of the following three parts: an upper tank half 7 and a lower tank half 8 formed in a cup shape and opposed to be partitioned into a fuel storage chamber 10; and a space is left to cover the lower tank half The bo...

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Abstract

A fuel tank formed by integrally forming flanges (7f, 8f) at the peripheral edge parts of bowl-like steel sheet-made upper tank half body (7) and lower tank half body (8), and overlappingly joining these flanges (7f, 8f), liquid-tight, to each other. These both flanges (7f, 8f) are fixedly caulked in a roll shape to form an annular thick wall joined part (12), and a pair of annular reinforcement ribs (7r, 8r) arranged continuously with both sides of the joined part (12) are formed on the upper and lower tank half bodies (7, 8), the upper tank half body (7) and the lower tank half body (8) are made of color steel sheet with prebakded film (11) on the surface of the steel sheet. Thus, a sufficient strength can be imparted to the periphery of the joined part of the flanges without increasing the thickness of the steel sheet.

Description

Technical field [0001] The present invention relates to a fuel tank in which a flange is integrally formed on each peripheral edge of an upper tank half and a lower tank half made of a cup-shaped steel plate, and the flanges are overlapped and are liquid-tight In particular, it relates to the improvement of fuel tanks suitable for general-purpose engines mounted on working machines. Background technique [0002] In related conventional fuel tanks, welding (Patent Document 1) or riveting is used for joining the flanges of the upper tank half and the lower tank half to each other. [0003] Patent Document 1: Japanese Gazette No. 57-22026 [0004] However, general-purpose engines are sometimes in a state of overturning due to their severe use environment. At this time, the fuel tank also has to resist a large impact, especially the flange joints of the upper and lower tank halves are not The high intensity of fuel leakage occurs. In addition, in the past, the increase in the thicknes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D8/20B60K15/03F02M37/00
Inventor 坂本一弘齐藤照幸松原泰则
Owner HONDA MOTOR CO LTD